METHOD
Dry roast the mustard seeds in a pan.Strain it.
In a blender add roasted mustard seeds,cumin seeds,garlic,ginger and salt and blend to make a paste.
Heat oil in a pan.
Add asafoetida and mustard paste and stir occassionaly in a low flame.
Add red chilly powder,turmeric powder and sugar and mix well
Switch off the gas.
Add vinegar and mix well..